scholarly journals Usefulness of ECG to differentiate apical hypertrophic cardiomyopathy from non-ST elevation acute coronary syndrome

2020 ◽  
Author(s):  
Yirao Tao ◽  
Jing Xu ◽  
Samira Yerima Bako ◽  
Xiaobo Yao ◽  
Donghui Yang
Keyword(s):  
Acute Coronary Syndrome ◽  
Hypertrophic Cardiomyopathy ◽  
Maximal Amplitude ◽  
Apical Hypertrophic Cardiomyopathy ◽  
Coronary Syndrome ◽  
T Wave ◽  
St Segment ◽  
St Elevation ◽  
Elevation Acute Coronary Syndrome ◽  
T Waves

Abstract Objective: Apical hypertrophic cardiomyopathy (ApHCM) is a phenotypic variant of nonobstructive HCM. ApHCM is characterized by left ventricular hypertrophy involve the distal apex. The electrocardiographic character of ApHCM can mimic non-ST elevation acute coronary syndrome (NSTEACS) which triggers a series of studies and treatments that may be unnecessary. This study aimed to clarify the ECG differences between the two diseases.Methods: Initial electrocardiogram (ECG) recordings of 41 patients with ApHCM and 72 patients with NSTEACS were analyzed retrospectively. We analyzed the voltage of negative T (neg T) wave, R wave and the change of ST-segment in the 12-lead ECGs as well as the number of leads with neg T waves.Results: Across the 12-lead ECGs, the magnitude of R wave significantly differed between ApHCM and NSTEACS in 10 leads excluding leads aVR and V1. ApHCM was associated with a greater maximal amplitude of R wave in lead V5 (3.13±1.08 vs. 1.38±0.73, P=0.000). The magnitude of T wave significantly differed between ApHCM and NSTEACS in 10 leads excluding leads II and V1. ApHCM was associated with a greater maximal amplitude of neg T wave in lead V4 (0.85±0.69 vs. 0.35±0.23, P=0.000). The frequency of giant neg T (1mv or more) wave was higher in ApHCM (36.5% vs. 0%, P=0.000). The magnitude of ST-segment deviation significantly differed between ApHCM and NSTEACS in 10 leads excluding leads aVF and V2. ApHCM was associated with a greater maximal amplitude of ST-segment depression in lead V5 (0.19±0.07 vs. 0.03±0.06, P=0.000). The number of leads with neg T waves also differed between ApHCM and NSTEACS (6.75±1.42 vs. 6.08±1.51, P=0.046). The sum of R wave in lead V5, neg T wave in lead V6 and ST-segment depression in lead V4>2.585 mV identified ApHCM with 90.2% sensibility and 87.5% specificity, representing the highest diagnostic accuracy.Conclusions: Compared with NSTEACS patients, ApHCM patients presented higher R waves and neg T wave voltage as well as a greater ST-segment depression in the 12-lead ECGs.

scholarly journals MODERN METHODS TO DIFFERENTIATE BETWEEN CHEST PAIN AND CARDIAC ISCHEMIA

2020 ◽  
Vol 49 (06) ◽  
pp. 43-43
Author(s):  
Giorgi Javakhishvili ◽  
Rusudan Sujashvili
Keyword(s):  
Acute Coronary Syndrome ◽  
Acute Coronary Syndromes ◽  
St Segment Elevation ◽  
Coronary Syndrome ◽  
T Wave ◽  
Fibrous Cap ◽  
St Segment ◽  
Coronary Syndromes ◽  
St Elevation ◽  
Elevation Acute Coronary Syndrome

Acute coronary syndrome (ACS) is a group of conditions which often present with similar signs and symptoms while having different outcomes and complications. Therefore it is essential to differentiate between them as soon as possible and provide appropriate management. Acute coronary syndromes are classified into two categories: STE-ACS (ST segment Elevation Acute Coronary Syndrome) and NSTE-ACS (Non ST segment Elevation Acute Coronary Syndrome). STE-ACS stands for ST Elevation Acute Coronary Syndrome all of which demonstrate significant ST elevations on ECG due to complete blockage of artery by thrombus, while NSTE-ACS is due to partial occlusion of artery which exhibit ST segment depression and/or T wave inversions. Patients with NSTE-ACS who do not develop infarction are diagnosed with unstable angina, which itself is a precursor of myocardial infarction. Acute coronary syndromes are considered multifactorial and risk factors most commonly associated with development of acute coronary syndromes include: hypertension, smoking, diabetes, obesity, sedentary life-style, hereditary conditions etc. Chronic stress to the coronary endothelium eventually leads to inflammation and atherosclerotic plaque formation. Plaque at some point with additional stress will rupture and trigger thrombus formation. Probability of plaque rupture depends on its composition: stable plaques contain small fatty core and thick fibrous cap, unstable plaque have larger fatty cores and thin fibrous cap. Patients with acute coronary syndromes present with chest pain and/or discomfort and may experience tightness and pressure sensation; pain may radiate to left or both arms, jaw, back or stomach, sweating, dyspnea and dizziness are also common complaints. Whenever we suspect ACS first diagnostic tests is always ECG (Electrocardiography). If ST segment is persistently elevated STEMI (ST Elevation Myocardial Infarction) can be diagnosed and reperfusion therapy is indicated; but if ST segment is depressed and/or T wave inversion is present laboratory tests are necessary for diagnosis. Cardiac biomarkers mainly used in the clinic are Troponins and CK-MB (Creatine Kinase MB), yet LDH (lactate dehydrogenase), B-type natriuretic peptide and C-reactive protein can be used additionally. Several studies have been conducted in hopes to find other myocardial markers useful for diagnosis of ACS, one of which tested candidate biomarkers such as hFABP (Heart-type fatty acid binding protein), GPBB (Glycogen Phosphorylase Isoenzyme BB), S100, PAPP-A (Pregnancy-associated plasma protein A), TNF (Tumor Necrosis Factor), IL6 (Interleukin 6), IL18 (Interleukin 18), CD40 (Cluster of differentiation 40) ligand, MPO (Myeloperoxidase), MMP9 (Matrix metallopeptidase 9), cell-adhesion molecules, oxidized LDL (Low Density Lipoprotein), glutathione, homocysteine, fibrinogen, and D-dimer, procalcitonin. The idea of this study was to estimate usefulness of combining enzymatic markers with nonenzymatic ones in the clinical settings.

scholarly journals Significance of ST Segment Elevation in Lead aVR in Patients with Non-ST Elevation Acute Coronary Syndrome

2019 ◽  
Vol 14 (2) ◽  
pp. 71-76
Author(s):  
Pritam Kumar Gachchhadar ◽  
Manzoor Mahmood ◽  
Dipal Krishna Adhikary ◽  
MSI Tipu Chowdhury ◽  
Md Ashraf Uddin Sultan ◽  
...  
Keyword(s):  
Acute Coronary Syndrome ◽  
Area Under The Curve ◽  
Left Main ◽  
St Segment Elevation ◽  
Coronary Syndrome ◽  
Triple Vessel Disease ◽  
St Segment ◽  
Lead Avr ◽  
St Elevation ◽  
Elevation Acute Coronary Syndrome

Background: As acute occlusion of the left main (LM) artery causes life-threatening hemodynamic deterioration and malignant arrhythmias, resulting in an adverse outcome, a rapid diagnosis and subsequent urgent revascularization with percutaneous coronary intervention (PCI) or coronary bypass surgery is very important in this subset of patients. The 12-lead electrocardiogram (ECG) is a crucial tool in the diagnosis and risk stratification of acute coronary syndrome (ACS). Unlike other 11 leads, lead aVR has been long neglected until recent years. Objective: To determine the accuracy of 12-lead electrocardiography in predicting left main and/or triplevessel disease in patients with non-ST elevation acute coronary syndrome (NSTE- ACS). Methodology: This cross sectional observational study carried out among patients presenting with non-ST elevation acute coronary syndrome at Cardiac Emergency Department or CCU of BSMMU. This study was conducted from May 2017 to April 2018. A total of 36 patients meeting the eligibility criteria were consecutively included. Data collection was carried out by using a questionnaire. Informed written consent was obtained from the hospital authority. Analysis of data was finally done with Statistical Package for Social Science program 17 version of computer on the basis of different variables. Result: As ST-segment elevation in lead aVR is a continuous variable, a suitable cut-off for ST- elevation in lead aVR was found out for diagnosing LM and/or triple vessel disease (TVD) using ROC curve. The cut-off value was 0.75 mm which gave us an optimum sensitivity of 88.5% and a specificity of 80% with an area under the curve being 0.892(95% CI = 0.785-1.000), p < 0.001. The area under the curve demonstrated that 89.2% of the LM and/or TVD were correctly diagnosed with ST elevation e” 0.75 mm in lead aVR in patients with non-ST segment elevation acute coronary syndrome. The positive predictive value was commendably high (92%) and negative predictive value was no less (72.7%) with an overall diagnostic accuracy of 86%. Conclusion: From the findings of the study it can be concluded that ST- segment elevation e”0.75 mm in lead aVR in patients of non-ST segment elevation acute coronary syndrome had optimum sensitivity and specificity with an appreciably high overall diagnostic accuracy. The ST- segment elevation e”0.75 mm in lead aVR in patients with non-STE-ACS can differentiate LM and/or triple vessel disease with fair degree of accuracy. University Heart Journal Vol. 14, No. 2, Jul 2018; 71-76

scholarly journals Coronary Neutrophil Extracellular Trap Burden and Deoxyribonuclease Activity in ST-Elevation Acute Coronary Syndrome Are Predictors of ST-Segment Resolution and Infarct Size

2015 ◽  
Vol 116 (7) ◽  
pp. 1182-1192 ◽  
Author(s):  
Andreas Mangold ◽  
Sherin Alias ◽  
Thomas Scherz ◽  
Thomas M. Hofbauer ◽  
Johannes Jakowitsch ◽  
...  
Keyword(s):  
Acute Coronary Syndrome ◽  
Infarct Size ◽  
Neutrophil Extracellular Trap ◽  
Myocardial Infarct Size ◽  
Polymorphonuclear Cells ◽  
Coronary Syndrome ◽  
St Segment ◽  
St Elevation ◽  
Elevation Acute Coronary Syndrome ◽  
Deoxyribonuclease Activity

Rationale: Mechanisms of coronary occlusion in ST-elevation acute coronary syndrome are poorly understood. We have previously reported that neutrophil (polymorphonuclear cells [PMNs]) accumulation in culprit lesion site (CLS) thrombus is a predictor of cardiovascular outcomes. Objective: The goal of this study was to characterize PMN activation at the CLS. We examined the relationships between CLS neutrophil extracellular traps (NETs), bacterial components as triggers of NETosis, activity of endogenous deoxyribonuclease, ST-segment resolution, and infarct size. Methods and Results: We analyzed coronary thrombectomies from 111 patients with ST-elevation acute coronary syndrome undergoing primary percutaneous coronary intervention. Thrombi were characterized by immunostaining, flow cytometry, bacterial profiling, and immunometric and enzymatic assays. Compared with femoral PMNs, CLS PMNs were highly activated and formed aggregates with platelets. Nucleosomes, double-stranded DNA, neutrophil elastase, myeloperoxidase, and myeloid-related protein 8/14 were increased in CLS plasma, and NETs contributed to the scaffolds of particulate coronary thrombi. Copy numbers of Streptococcus species correlated positively with dsDNA. Thrombus NET burden correlated positively with infarct size and negatively with ST-segment resolution, whereas CLS deoxyribonuclease activity correlated negatively with infarct size and positively with ST-segment resolution. Recombinant deoxyribonuclease accelerated the lysis of coronary thrombi ex vivo. Conclusions: PMNs are highly activated in ST-elevation acute coronary syndrome and undergo NETosis at the CLS. Coronary NET burden and deoxyribonuclease activity are predictors of ST-segment resolution and myocardial infarct size.

Early negative T waves and viable myocardium in patients with a first ST-elevation acute coronary syndrome

2005 ◽  
Vol 38 (3) ◽  
pp. 171-178 ◽  
Author(s):  
Jaume Figueras ◽  
Josefa Cortadellas ◽  
Josep Rodés ◽  
Enric Domingo ◽  
Joan Castell ◽  
...  
Keyword(s):  
Acute Coronary Syndrome ◽  
Viable Myocardium ◽  
Coronary Syndrome ◽  
St Elevation ◽  
Elevation Acute Coronary Syndrome ◽  
T Waves

Apical hypertrophic cardiomyopathy treated as ST-elevation myocardial infarction

CJEM ◽  
2017 ◽  
Vol 20 (S2) ◽  
pp. S51-S55 ◽  
Author(s):  
Christopher J. Parr ◽  
Rajat Sharma ◽  
Philip J. Garber
Keyword(s):  
Myocardial Infarction ◽  
Hypertrophic Cardiomyopathy ◽  
St Elevation Myocardial Infarction ◽  
Apical Hypertrophic Cardiomyopathy ◽  
St Segment Elevation ◽  
Coronary Syndrome ◽  
Coronary Arterial Disease ◽  
St Segment ◽  
St Elevation ◽  
Electrocardiographic Findings

AbstractElectrocardiographic changes resulting from apical hypertrophic cardiomyopathy may mimic an acute coronary syndrome. A 67-year-old Sudanese male without cardiac risk factors presented to hospital with chest pain and electrocardiographic findings of septal ST-segment elevation, ST-segment depression in V4-V6, and diffuse T-wave inversion. He was treated as an acute ST-elevation myocardial infarction with thrombolytics. There was no cardiac biomarker rise and coronary angiography did not reveal evidence of significant coronary arterial disease. Ventriculography, transthoracic echocardiography, and cardiac magnetic resonance imaging were consistent with apical hypertrophic cardiomyopathy. The patient was discharged three days later with outpatient cardiology follow-up. We highlight the clinical and electrocardiographic findings of apical hypertrophic cardiomyopathy, with an emphasis on distinguishing this from acute myocardial infarction.

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